Different Types of Interior Paint and Where Each One Belongs

The different types of interior paint come down to what carries the colour. Most walls and ceilings today get water-based latex paint, usually acrylic, and oil-based alkyd paint is mostly kept for hard-wearing trim and doors. Interior paint is almost never oil these days. Acrylic latex is the usual pick for walls, and a water-based enamel suits trim and cabinets.

Different types of interior paint at a glance

That covers almost everything sold for house interiors. Sheen (flat, matte, eggshell, satin, semi-gloss) is a separate choice from type. Our paint finishes guide covers sheen.

Is interior paint latex or acrylic? Usually both

The words overlap, which confuses buyers. In the paint aisle, 'latex' just means water-based. There is no rubber involved. 'Acrylic' names the resin that holds the pigment and forms the film. Most interior paint is an acrylic latex or a vinyl-acrylic latex.

• 100 percent acrylic paints tend to stick better, flex better and scrub better. They cost more.
• Vinyl-acrylic blends are cheaper and fine for ceilings and low-traffic walls.
• Labels vary. Look for words like washable, scrubbable or for kitchens and baths, not just the resin name.

So the answer to 'is interior paint water based' is yes, in nearly every case. It cleans up with soap and water, dries quickly and has less odour than oil-based paint.

Is interior paint oil based? When alkyd still makes sense

Oil-based, or alkyd, paint used to be the default for trim and doors. Today it is a specialty choice. Advantages are real: it flows out smooth, leaves a hard film and grips glossy old finishes well. The drawbacks have pushed most people to water-based products.

• Slow drying. Hours to days between coats, compared with a few hours for latex. Dust has more time to settle on the wet surface.
• Strong fumes. It needs open windows and a fan in a closed Ontario house in cold weather.
• Yellowing. White and light alkyd paints can turn yellowish with age, especially in rooms with little light.
• Cleanup. Brushes need mineral spirits or another solvent.
• Fire risk with rags. Rags soaked in oil-based paint, stain or thinner can heat up as they dry and catch fire. Lay them flat outside to dry, or soak them in water in a sealed metal container, then follow local disposal rules.

The federal government sets maximum VOC concentration limits (VOCs are the vapour-forming solvents) for architectural coatings, with a different limit for each product category. Check the label for the VOC figure on any product you consider.

To tell what is on a wall already, rub a small spot with a cotton ball and rubbing alcohol. Latex paint softens and comes off on the ball. Oil-based paint does not.

Enamel and hybrid paints for trim, doors and cabinets

'Enamel' describes a paint that dries to a hard, smooth surface, not a separate chemistry. It can be oil-based or water-based. Modern water-based enamels, including acrylic and urethane-modified types, are the usual choice for baseboards, doors, window casings and cabinets. They resist knocks and wipe clean better than wall paint, and they do not smell like alkyd.

• Pick a satin or semi-gloss finish for trim and cabinets. They wash better than flat or matte.
• Use a bonding primer over old glossy or varnished surfaces, and a stain-blocking primer over knots and wood that bleeds tannins, like oak.
• Expect a long cure. The paint feels dry in hours but takes days or weeks to reach full hardness, depending on the product. Be gentle with doors and drawers until then.

For technique and prep, see painting wood trim and kitchen cabinet painting.

Paint and primer in one: what it does and does not do

The 'paint and primer in one' label means a thicker formula with more solids, so it covers better and hides colour changes in fewer coats. It works best over sound, clean, already-painted walls.

It does not replace a real primer when you have:

• New drywall or fresh plaster, which needs a drywall primer so the surface absorbs evenly.
• Stains from water, smoke or marker, which need a stain-blocking primer.
• Bare wood or glossy surfaces, which need a primer made to grip.
• Large repair patches, which can show as dull spots if left unprimed.

Our post on when to prime before painting has the full list. Treat one-coat claims with caution, and plan on two coats for a colour change.

Which type to use: walls, trim, kitchens and baths

• Living areas, bedrooms and hallways: acrylic latex in matte or eggshell.
• Ceilings: flat acrylic or vinyl-acrylic latex made for ceilings, which hides roller marks.
• Kitchens and bathrooms: acrylic latex in satin or semi-gloss, labelled washable and moisture resistant. Run the fan while painting and after.
• Trim, doors and baseboards: water-based enamel, or alkyd if you want the old look and can ventilate.
• Cabinets and vanities: a cabinet-grade water-based enamel over a bonding primer.
• Basements: acrylic latex, once any moisture problem is fixed. Paint does not cure a damp wall.

If you are repainting over existing oil-based trim, the surface needs a scuff-sand and a bonding primer before latex goes on. If you would rather have someone else choose and apply the right system, D&D Interior Services gives a free written quote for interior painting that covers prep, primer and finish coats.

Low-VOC paint, cleanup and leftover paint in Ontario

VOCs. 'Low-VOC' and 'zero-VOC' are label claims, and they are not the same across brands. Tinting a colour can add some VOCs. Ventilate in any case, and see our low-VOC paint post for what to look for.

Cleanup. Latex brushes and rollers wash out with warm water and soap. Alkyd needs solvent, and the solvent has its own disposal rules.

Leftovers. Do not pour paint down a drain or put liquid paint in the garbage. Take leftover paint to your municipality's household hazardous waste program, and check its website for what it accepts.

Storage. Latex paint can be ruined by freezing, so skip an unheated garage in an Ontario winter. Seal the lid, label the room and sheen, and keep a small jar for touch-ups.

Interior paint type questions

Is interior paint latex or acrylic?

Usually both. In paint, 'latex' means water-based, and 'acrylic' is the resin inside it. Most interior paint is an acrylic latex or a vinyl-acrylic latex. No rubber is involved. A 100 percent acrylic paint generally holds up and scrubs better than a vinyl-acrylic blend, and it costs more.

Is interior paint oil based?

Rarely now. Most interior wall paint is water-based. Oil-based alkyd paint is still sold for trim, doors and metal, where its smooth, hard finish is useful. It dries slowly, smells strongly and tends to yellow over time. Water-based enamel now does most of the same jobs with fewer drawbacks.

Can you paint latex over oil-based paint?

Yes, with the right prep. Clean the surface, scuff-sand it until dull and apply a bonding primer made for glossy surfaces. Then paint with latex. Without that prep, latex can peel off oil-based paint. If you are unsure what is on the wall, the rubbing alcohol test on a hidden spot will tell you.

Is interior paint water based?

In almost every case, yes. Latex and acrylic paints are water-based and clean up with soap and water. They dry in hours and have less odour than oil-based paint. Always read the can, though. A product that lists mineral spirits for cleanup is oil-based and needs extra ventilation and careful disposal.

Devon Moore, Operations Lead Co-Founder & Operations Lead — D&D Interior Services

Devon Moore is the co-founder and Operations Lead at D&D Interior Services, delivering kitchen renovations, bathroom renovations, flooring, and interior upgrades across Waterloo Region.